package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;

import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        log.info("新增菜品：{}", dishDTO);
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //向菜品表插入1数据
        dishMapper.insert(dish);
        //向口味表插入n条数据
        long id =dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(id));
            //插入口味数据
            dishFlavorMapper.insert(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());

        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());

    }

    /**
     * 批量删除菜品
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {

        for (Long id : ids) {
            //先判断菜品是否还在出售
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                //当前分类下有菜品正在出售，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }

        }

        //在判断菜品是否被套餐关联
        List<Long> setmealIds =setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds != null && setmealIds.size() > 0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除菜品
//        for (Long id : ids) {
//            dishMapper.deleteBatch(id);
//            //删除口味
//            dishFlavorMapper.deleteByDishId(id);
//        }
        /**
         * 优化
         * 批量删除菜品和口味
         */
        dishMapper.deleteByIds(ids);
        dishFlavorMapper.deleteByDishIds(ids);


    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    @Override
    @Transactional
    public DishVO getByIdWithFlavor(Long id) {
        DishVO dishVO = dishMapper.getByIdWithFlavor(id);
        dishVO.setFlavors(dishFlavorMapper.getFlavorByDishId(id));
        return dishVO;
    }

    /**
     * 修改菜品
     * @param dishDTO
     */
    @Override
    @Transactional
    public void updateWithFlavor(DishDTO dishDTO) {
        //修改菜品
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        //删除口味
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //增加口味
        List<DishFlavor> list=dishDTO.getFlavors();
        if(list!=null&&list.size()>0){
            list.forEach(item->((DishFlavor) item).setDishId(dishDTO.getId()));
            dishFlavorMapper.insert(list);
        }

    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder().id(id).status(status).build();
        dishMapper.update(dish);
    }

    @Override
    public List<Dish> list(Long categoryId) {
        List<Dish> dishes=dishMapper.listByCategoryId(categoryId);
        return dishes;
    }

    /**
     * 微信搜索菜品
     * @param dish
     * @return
     */
    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList=dishMapper.listByCategoryId(dish.getCategoryId());

        List<DishVO> dishVOLsit=new ArrayList<>();

        for (Dish d : dishList){
            DishVO dishVO=new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //查询口味
            List<DishFlavor> flavors=dishFlavorMapper.getFlavorByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOLsit.add(dishVO);
        }

        return dishVOLsit;
    }
}
